88 lines
2.5 KiB
JavaScript
88 lines
2.5 KiB
JavaScript
import {
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createError,
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eventHandler,
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getRequestHeader,
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getResponseHeader,
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removeResponseHeader,
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setResponseHeader,
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appendResponseHeader,
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setResponseStatus
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} from "h3";
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import {
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decodePath,
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joinURL,
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parseURL,
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withLeadingSlash,
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withoutTrailingSlash
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} from "ufo";
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import {
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getAsset,
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isPublicAssetURL,
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readAsset
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} from "#nitro-internal-virtual/public-assets";
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const METHODS = /* @__PURE__ */ new Set(["HEAD", "GET"]);
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const EncodingMap = { gzip: ".gz", br: ".br" };
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export default eventHandler((event) => {
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if (event.method && !METHODS.has(event.method)) {
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return;
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}
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let id = decodePath(
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withLeadingSlash(withoutTrailingSlash(parseURL(event.path).pathname))
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);
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let asset;
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const encodingHeader = String(
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getRequestHeader(event, "accept-encoding") || ""
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);
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const encodings = [
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...encodingHeader.split(",").map((e) => EncodingMap[e.trim()]).filter(Boolean).sort(),
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""
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];
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if (encodings.length > 1) {
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appendResponseHeader(event, "Vary", "Accept-Encoding");
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}
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for (const encoding of encodings) {
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for (const _id of [id + encoding, joinURL(id, "index.html" + encoding)]) {
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const _asset = getAsset(_id);
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if (_asset) {
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asset = _asset;
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id = _id;
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break;
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}
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}
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}
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if (!asset) {
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if (isPublicAssetURL(id)) {
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removeResponseHeader(event, "Cache-Control");
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throw createError({ statusCode: 404 });
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}
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return;
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}
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const ifNotMatch = getRequestHeader(event, "if-none-match") === asset.etag;
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if (ifNotMatch) {
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setResponseStatus(event, 304, "Not Modified");
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return "";
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}
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const ifModifiedSinceH = getRequestHeader(event, "if-modified-since");
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const mtimeDate = new Date(asset.mtime);
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if (ifModifiedSinceH && asset.mtime && new Date(ifModifiedSinceH) >= mtimeDate) {
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setResponseStatus(event, 304, "Not Modified");
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return "";
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}
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if (asset.type && !getResponseHeader(event, "Content-Type")) {
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setResponseHeader(event, "Content-Type", asset.type);
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}
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if (asset.etag && !getResponseHeader(event, "ETag")) {
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setResponseHeader(event, "ETag", asset.etag);
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}
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if (asset.mtime && !getResponseHeader(event, "Last-Modified")) {
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setResponseHeader(event, "Last-Modified", mtimeDate.toUTCString());
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}
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if (asset.encoding && !getResponseHeader(event, "Content-Encoding")) {
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setResponseHeader(event, "Content-Encoding", asset.encoding);
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}
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if (asset.size > 0 && !getResponseHeader(event, "Content-Length")) {
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setResponseHeader(event, "Content-Length", asset.size);
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}
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return readAsset(id);
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});
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